We report on timing and single-pulse observations of 17 pulsars discovered at the Arecibo observatory .
The highlights of our sample are the recycled pulsars J1829+2456 , J1944+0907 and the drifting subpulses observed in PSR J0815+0939 .
For the double neutron star binary J1829+2456 , in addition to improving upon our existing measurement of relativistic periastron advance , we have now measured the pulsar ’ s spin period derivative .
This new result sets an upper limit on the transverse speed of 120 km s ^ { -1 } and a lower limit on the characteristic age of 12.4 Gyr .
From our measurement of proper motion of the isolated 5.2-ms pulsar J1944+0907 , we infer a transverse speed of 188 \pm 65 km s ^ { -1 } .
This is higher than that of any other isolated millisecond pulsar .
An estimate of the speed , using interstellar scintillation , of 235 \pm 45 km s ^ { -1 } indicates that the scattering medium along the line of sight is non-uniform .
We discuss the drifting subpulses detected from three pulsars in the sample , in particular the remarkable drifting subpulse properties of the 645-ms pulsar J0815+0939 .
Drifting is observed in all four components of the pulse profile , with the sense of drift varying among the different components .
This unusual ‘ bi-drifting ” behaviour challenges standard explanations of the drifting subpulse phenomenon .